Dr. Ahmed G. Abo-Khalil

Electrical Engineering Department

Lockout-tagout

Lockout-tagout (LOTO) or lock and tag is a safety
procedure which is used in industry and research settings to ensure that
dangerous machines are properly shut off and not started up again prior
to the completion of maintenance or servicing work. It requires that
hazardous power sources be "isolated and rendered inoperative" before
any repair procedure is started. "Lock and tag" works in conjunction
with a lock usually locking the device or the power source with the hasp, and placing it in such a position that no hazardous power sources can be turned on. The procedure requires that a tag be affixed to the locked device indicating that it should not be turned on.